screen

2. to separate well individuals in a population from those who have an undiagnosed disease, defect, or other pathologic condition or who are at high risk by means of tests, examinations, or other procedures. See also screening.

fluoroscopic screen a phosphorescent screen that shows the movement and relationship of organs and structures in fluoroscopy.

intensifying screen a fluorescent screen used in conjunction with x-ray film to enhance the effect of the radiation and reduce dosage to the patient. The screen must be matched to the emissivity range; the emissivity of phosphorus is similar to that of the human eye, so that phosphors absorb x-ray energy and convert it to visible light.

tangent screen a large square of black cloth with a central mark for fixation; used with a campimeter in mapping the field of vision.

screen

(skrēn),

1. A sheet of any substance used to shield an object from any influence, such as heat, light, or x-rays. See also: screen memory.

screen

1. To process a group of people in order to select or separate certain individuals from it.

2. To test or examine for the presence of disease or infection.

3. To subject to genetic screening.

screen

Molecular biologyverb To detect a phenotype’s presence or absence by testing for growth under different conditions (e.g., plus and minus an auxotrophic supplement or permissive and non-permissive conditions), usually done by replica plating or patching colonies onto each type of plate.

Public healthnoun(1) Any systematic activity—e.g., measuring BP, glucose or cholesterol; pap smear; or other activity—which attempts to identify a particular disease in persons in a particular population.(2) A popular term for a solar protection barrier.

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